Question about 2003 Nissan Altima

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Blower Motor Fan stuck on HI

Im having a problem with my 2003 Altima 3.5 SE. It seems that I had an alternator go out. At the same time my A/C, Heater blower motor is now stuck on hi. No matter if I turn it off, it still runs on hi. FYI, this is equipped with the automatic temp controll unit. Could this be the Blwer Motor resister? I need to know before I spend the money.

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  • larry724 Mar 16, 2009

    blower for a/c and heater will not activate. fuses are ok and the digital climate control seems to be working (shows read out for temp and fan level.

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I would prob replace the controller unit its extremly easy to take out. the plastic surrounding it pops off and then remove the screws holding it in and unplug it. you can prob find one for pretty cheap on ebay or check your local junk yard that has the newer imports. im sure the controll unit went bad when the alt was replaced

Posted on Feb 10, 2009

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99.9 % of this problem on cars is the BLOWER MOTOR RESISTOR.
The blower motor resistor give the speed to the Fan.
But on High speed the switch make a By pass of the switch using a Relay for the high speed.
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If you replace the blower motor resistor you have 99.9% of this will solve your problem.

I'm a Mechanic.

I hope this help on your problem.
Thank you for use fixya...

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